Benjamin Zi Hao Zhao
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2026
Protecting User Prompts Via Character-Level Differential Privacy
The paper proposes a character-level differential privacy mechanism to sanitize sensitive user prompts for LLMs, achieving high privacy for PII while maintaining utility for non-sensitive context.
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Papers
cs.CRRecentMar 27, 2026
Protecting User Prompts Via Character-Level Differential Privacy
Shashie Dilhara Batan Arachchige, Hassan Jameel Asghar, Benjamin Zi Hao Zhao, Dinusha Vatsalan +1 more
The paper proposes a character-level differential privacy mechanism to sanitize sensitive user prompts for LLMs, achieving high privacy for PII while maintaining utility for non-sensitive context.
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